      COMMON /IDAT1/ NCOL,NROW,NLAY,NCBL,IGRID,NLPOR,NZDIM,NPART,NCP1,
     1               NRP1,NLP1,NUNIT,MODE,I1,I2,I3,I4,I5,I6,I7,I8,I9,
     2               IBATCH,ISILNT,NTMPO,IBYTES,I10,NPER,NBOTM,ISS
